Delegates to a climate summit in December remain divided over fundamental issues including a framework for measuring carbon emissions, the envoy of the host nation said, though she believes a deal to cut global warming will be signed.

Representatives from almost 200 countries will meet in Paris from November 30 to December 11, tasked with reaching an accord to keep temperatures below a ceiling of 2˚C above pre-industrial levels.

A similar summit six years ago in Copenhagen ended without agreement, and France’s envoy Laurence Tubiana said current negotiations pointed to a deal that would put the planet on a path to exceeding that threshold.

Several thorny issues had yet to be thrashed out, she told Reuters in an interview.

They included disagreements over what range of carbon emissions to measure, with oil-producing nations arguing that the focus should not only be on fossil fuels but also on emissions from agriculture and other sectors, she said.

There were also still differences over how to measure and verify emissions, and over the issue of state contributions to fund greenhouse gas cuts in developing nations.

We have a draft agreement ... which will drop maybe 15 to 20 pages in Paris. It is quite manageable

A dispute over how to finance poor nations facing the worst effects of climate change hampered negotiations and slowed progress during a week-long meeting in Bonn, Germany, last week.

“There were nevertheless some advances, although they are diffi-cult to spot,” Tubiana said. “We added some amendments.”

Some 154 out of the 195 participating countries have submitted their national programmes to reduce greenhouse gas emissions to the United Nations, which is distilling them into a report to be published tomorrow.

That already counted as a success, Tubiana said, even if it was not enough to put the planet on the path of a warming limited to 2˚C by 2100.

“We have a draft agreement... which will drop to maybe 15 or 20 pages in Paris. It is quite manageable,” she said.

“You can never guarantee there won’t be a mishap, but there is real political will to make it happen ... I think there’s a good chance of having an agreement.”